linux-kernel - Re: [PATCH v7 09/16] libnvdimm, pmem: move pmem to drivers/nvdimm/

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Message-ID: <CAPcyv4jEhoYsW_M3SPG1_YVQCXtnytg6Wi+BfXU=idFSp-2wYg@mail.gmail.com>
Date:	Wed, 1 Jul 2015 09:41:34 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	Jens Axboe <axboe@...nel.dk>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Neil Brown <neilb@...e.de>,
	Greg KH <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Jeff Moyer <jmoyer@...hat.com>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v7 09/16] libnvdimm, pmem: move pmem to drivers/nvdimm/

On Wed, Jul 1, 2015 at 6:13 AM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> Hi Dan,
>
> On Thu, Jun 18, 2015 at 1:14 AM, Dan Williams <dan.j.williams@...el.com> wrote:
>> Prepare the pmem driver to consume PMEM namespaces emitted by regions of
>> an nvdimm_bus instance.  No functional change.
>
> As LIBNVDIMM depends on PHYS_ADDR_T_64BIT, the driver can no
> longer be enabled on pure 32-bit platforms. Is that intended?

Yes it was intentional.  It still allows 32-bit platforms with 64-bit
resource_size_t to compile. Do you otherwise have a 32-bit use case
for pmem?  I'm of course open to working through the changes to add
wider architecture support.
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